Abstract: A transmitter for transmitting an audio signal derived from an audio appliance to an FM (frequency modulation) radio includes a transmitter circuit for converting the audio signal derived from an audio appliance into an FM signal within an FM broadcasting band to thereby transmit the FM signal, a receiver circuit having at least a tuner unit; a display for displaying thereon a frequency; and a control circuit for controlling a transmission frequency of the transmitter circuit and a reception frequency of the receiver circuit. The control circuit causes the receiver circuit to detect an unused frequency within the FM broadcasting band and to set a frequency corresponding to the detected unused frequency to the transmission frequency, and also causes the display to display thereon the set transmission frequency.

Abstract: In a rotary flow-path exchanging valve, a high pressure side communicating groove 37 is provided to communicate a first exchanging port 23 and a second exchanging port 27 of a valve seat plate 5 with a high pressure side communicating port selectively. A part of a joint pipe 17 to be connected to the high pressure side port 19 is protruded into the high pressure side communicating groove 27. The protruding part constitutes a stopper pipe 20 for limiting the rotatable range of a valve element 1. In installing the stopper pipe 20, it is connected and secured to the high pressure side port 19 of the valve seat plate 5, and thereafter is hardened by plastic deformation processing. Thus, when the stopper pipe is heated by soldering for its securing to the valve seat 5, the necessary strength thereof can be maintained.

Abstract: A headphone apparatus includes a plurality of antennas for receiving an FM signal produced by FM-modulating a carrier signal with an audio signal, a plurality of tuning circuits for receiving reception signals of the plurality of antennas, a mixer circuit for causing tuning coils of the tuning circuits to be transformer-coupled to each other and for frequency-converting an output signal of one tuning circuit into an intermediate frequency signal, an FM demodulating circuit for FM-demodulating the intermediate frequency signal to produce the audio signal, and an acoustic unit for converting this audio signal into a sound. The directivity axes of the antennas are arranged perpendicularly thereby improving the reception of this headphone apparatus.

Abstract: A signal reproducing apparatus operating on a wireless basis and having a status signal multiplexed with audio signals and transmitted to a receiver containing a display, the status signal indicating the current operating status of a recording medium player. On receiving the status signal, the display indicates the current operating status of the recording medium player so that the user may accordingly control the player from a distance without the intervention of wires.

Abstract: A method and apparatus for the manufacture of a diaphragm from a fabric-containing sheet (material). The fabric-containing sheet produced by an extrusion molding machine in a width which is a multiple of the diameter of diaphragms to be manufactured is continuously fed in fixed pitches to a press vulcanizing device and an punching device, to permit automation of the manufacture of diaphragms and an appreciable reduction in the number of steps. This method, thus, improves the yield of materials used, permits down sizing of the production equipment, and reduces the motive power consumption.

Abstract: A system for feeding refrigerant in a refrigerator having a first evaporator delivering refrigerant to a second evaporator, refrigerant storage device having a first outlet to the first evaporator and a second outlet connected to the second evaporator and connected to the storage interior for equalizing developed gaseous pressures and including a generally u-shaped tube and a vapor pump for supplying refrigerant to the second evaporator and stopping the refrigerant flow to the first evaporator.

Abstract: Refrigerating apparatus comprising freezing and refrigerating compartments, to be controlled to different temperatures, which are provided with respective evaporators. During operation of a compressor, liquid refrigerant is always fed to the freezer evaporator, but is selectively fed to the refrigerator evaporator by function of a feed control device which comprises a vapor bubble pump as its essential component. The feed control device is supported by an insulation board which, in turn, is mounted on the back surface of an inner shell forming the freezing compartment such that a ratio of a distance 1 between the outer surface of the inner shell of the freezing compartment and the innermost surface of the feed control device with respect to the thickness m of the insulation wall filling the heat-insulation space defined by the inner shell and an outer shell of the freezing compartment.

Abstract: A refrigerating apparatus with at least two evaporators which are controlled at different temperatures by a refrigerant, a vapor bubble pump for pumping the refrigerant, a vapor bubble pump for pumping the refrigerant and a delayer located in the conduit path in which the refrigerant flows when said vapor bubble pump is not in operation for delaying the refrigerant flow therethrough.

Abstract: A refrigerating apparatus with at least two evaporators which are controlled at different temperatures by a refrigerant, a vapor bubble pump for pumping the refrigerant and a first and second pressure regulators of the refrigerant which are located on the upstream side of the evaporators.

Abstract: A refrigerating apparatus comprising at least two evaporators which are controlled at different temperatures by a refrigerant, conduits for conducting the refrigerant to the evaporators, a rising portion which is formed in one of the conduits and which has an irregularly formed inner surface, a heater winding around the outer surface of not only the irregularly formed portion but also the portion of the conduit above the irregularly formed portion in order to produce smoother, more effective bubbling action.